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Planetary Science Decadal Survey
Planetary Science Decadal Survey
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NASA Technical Documents
by Wolverton, B. C.; Douglas, Willard L.; Bounds, Keit
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Previously, preliminary data on the ability of a group of common indoor plants to remove organic chemical from indoor air was presented. The group of plants chosen for this study was determined by joint agreement between NASA and the Associated Landscape Contractors of America. The chemicals chosen for study were benzene, trichloroethylene, and formaldehyde. The results show that plants can play a major role in removal of organic chemicals from indoor air.
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Topics: ARTIFICIAL INTELLIGENCE, FUZZY SETS, FUZZY SYSTEMS, NEURAL NETS, SET THEORY, DYNAMICAL SYSTEMS,...
NASA Technical Documents
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Independent Tracking Coordination Program - trigonometric tables for calculating coordinates of satellites
Topics: COORDINATES, TRACKING SYSTEM, TRIGONOMETRY, COORDINATION, MATHEMATICAL TABLES, SATELLITE TRACKING,...
No Abstract Available
Topics: APOLLO SPACECRAFT, HEAT TRANSFER, SPACECRAFT CONFIGURATIONS, AERODYNAMIC HEATING, RESEARCH...
NASA Technical Documents
by Oberth, H
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A theoretical analysis of the parameters involved in spacecraft design and propulsion and the successful completion of space missions is presented. Various types of rockets and their specialized application are described. The physiological effects of space flight are discussed. The requirements for fuel, specific impulse, and energy considerations are included.
Topics: BOUNDARY LAYER SEPARATION, DIFFUSERS, NONUNIFORM FLOW, SEPARATED FLOW, PRESSURE GRADIENTS, VELOCITY...
NASA Technical Documents
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No Abstract Available
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Topics: ARTIFICIAL SATELLITES, GRAVITATIONAL FIELDS, PLANETARY ROTATION, SATELLITE PERTURBATION, ORBIT...
NASA Technical Documents
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For abstract, see N74-22890.
Topics: BED REST, PATHOLOGICAL EFFECTS, PATIENTS, CARDIOVASCULAR SYSTEM, CLINICAL MEDICINE, MUSCULAR...
NASA Technical Documents
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Manual control is discussed in terms of operator modeling, measurement of human response, mental workload, pilot/operator opinion, effects of motion, aircraft displays, supervisory control, automobile driving, and remote manipulation.
Topics: COMPUTER NETWORKS, COMPUTER SYSTEMS DESIGN, COMPUTER SYSTEMS PERFORMANCE, DATA CONVERSION ROUTINES,...
NASA Technical Documents
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This document presents the postflight trajectory for the Apollo/Saturn 5 AS-506 flight. Included is an analysis of the orbital and powered flight trajectories of the launch vehicle, the free flight trajectories of the expended S-1C and S-2 stages, and the slingshot trajectory of the S-4B/1U. Trajectory dependent parameters are provided in earth-fixed launch site, launch vehicle navigation, and geographic polar coordinate systems. The time history of the trajectory parameters for the launch...
Topics: AEROTHERMODYNAMICS, SPACECRAFT MODULES, SPACECREWS, DESIGN ANALYSIS, ENVIRONMENT EFFECTS, LUNAR...
Telemetry and ground support equipment design and developments for Deep Space Network
Topics: FLOW COEFFICIENTS, MOLECULAR FLOW, TURBULENT FLOW, VISCOSITY, TURBULENT BOUNDARY LAYER, VELOCITY...
NASA Technical Documents
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Statistical filter theory application in optimal position and velocity estimation on board circumlunar vehicles
Topics: ESTIMATING, SPACECRAFT, STATISTICAL ANALYSIS, VELOCITY, SPACE VEHICLE, VELOCITY
NASA Technical Documents
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All the basic areas of anthropometry and its applications to the design of clothing, equipment, and workspaces for manned space flight are presented.
Topics: CANCER, NEOPLASMS, RADIOBIOLOGY, TUMORS, CONFERENCES, HYPERTHERMIA, RADIATION THERAPY, RADIO...
Methane, methanol, glycerol, and hydrocarbons for microbial life support systems on extended space missions, animal links in closed system, use of wastes, and chemical synthesis of food
Topics: HYDROCARBONS, HUMAN WASTES, MICROBIOLOGY, MICROORGANISMS, NUTRIENTS, SPACE MISSIONS, SPACECRAFT...
NASA Technical Documents
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No Abstract Available
Topics: COMMUNICATION NETWORKS, RELIABILITY ENGINEERING, TOPOLOGY, FAILURE ANALYSIS, FAULT TREES, GRAPH...
NASA Technical Documents
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This book is, in essence, sixteen years in the making. First attempted to compile a history of the Soviet space program in 1982 author put together a rough chronology of the main events. A decade later, while living on a couch in a college friend's apartment, he began writing what would be a short history of the Soviet lunar landing program. The first draft was sixty-nine pages long. Late the following year, he decided to expand the topic to handle all early Soviet piloted exploration programs....
Topics: STATISTICAL ANALYSIS, RADIATIVE TRANSFER, SOLAR RADIATION, CLOUD COVER, CLOUDS (METEOROLOGY),...
NASA Technical Documents
by Compton, W. D.; Benson, C. D
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The history of Skylab is examined with emphasis on program development from previous Apollo missions, modifications to spacecraft, onboard experiments, and flight crew training. A listing of the missions and an evaluation of results are included with a brief description of the workshop's reentry.
Topics: AIR SAMPLING, TABLES (DATA), TOXIC HAZARDS, ATMOSPHERIC COMPOSITION, BOEING 747 AIRCRAFT, CABIN...
Paper describes how a single launch Mars Sample Return (MSR) mission could potentially be enabled by using of Electric Propulsion with Hall Thrusters: a well established, off-the-shelf technology commonly used on communications satellites today.
Planetary Science Decadal Survey
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The Moon's regolith contains vast resources of helium-3 an ideal fuel for terrestrial fusion power systems. Development of plans for private sector investment in obtaining helium-3 and its by-products requires detailed definition of that isotope's selenographic distribution.
NASA Technical Documents
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No Abstract Available
Topics: AIRCRAFT ANTENNAS, ICE FORMATION, LOADS (FORCES), ANGLES (GEOMETRY), ANTENNA DESIGN, DROP SIZE, ICE...
Planetary Science Decadal Survey
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Near Earth objects (NEOs) are attractive targets for spacecraft missions with the purpose of obtaining greater insight to the nature of the original bodies from which the terrestrial planets formed, without having to visit the Main Belt itself. Greater knowledge of NEOs directly sheds light on the origin and evolution of the asteroid belt, the formation of planets, and the history of the solar system. This report describes a search for NEOs that would be accessible for missions launching in...
Topics: Asteroids, NASA, Decadal, Trajectory Opportunities, Survey, Near Earth Asteroids, NEOs
NASA Technical Documents
by Mateer, G. G.; Seegmiller, H. L.; Hand, L. A.; Szodruch, J
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Detailed experimental data were obtained on a supercritical airfoil and in the surrounding flowfield. Surface pressures were measured on both the model and wind-tunnel walls. The velocity field above the airfoil and the field in its wake was documented using a laser Doppler velocimeter. The data illustrate the effect of Mach number and angle of attack on the flow over the airfoil. Angles of attack ranged from 0.5 to 1.5 degrees and the Mach number was varied from 0.73 to 0.8. These variations...
Topics: INTERPLANETARY SPACECRAFT, MANNED SPACECRAFT, MISSION PLANNING, SPACE TRANSPORTATION, TECHNOLOGY...
Planetary Science Decadal Survey
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The Enceladus Orbiter (EO) mission would explore Saturn's moon Enceladus, investigating the following in order of priority: -The nature of Enceladus's cryovolcanic activity -The internal structure and chemistry of Enceladus -The geology of Enceladus -The interaction of Enceladus with the Saturn system -The surfaces and interiors of Saturn's moons Rhea, Dione and Tethys -Preparation for potential future landing on Enceladus
Topics: Enceladus, NASA, MIssion Concept Study, Decadal
No Abstract Available
Topics: BEND TESTS, VAPOR DEPOSITION, CERAMICS, DUCTILITY, MAGNESIUM OXIDES, POLYCRYSTALS, SODIUM...
NASA Technical Documents
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Satellite technology has been an integral part of maritime search and rescue since the Cospas-Sarsat system began operation in 1984. This system, credited with more than eighty-six hundred lives saved, has recently been augmented to provide immediate response through geostationary satellites. The other satellite-based distress alerting system, INMARSAT, launched its emergency Standard C service in 1991 and Standard E in 1997. Current plans call for a continuation of service from both of these...
Topics: X RAYS, SPECTRA, SENSITIVITY, MORPHOLOGY, LOSSES, GALAXIES, COSMOLOGY, CORRECTION, COLOR,...
NASA Technical Documents
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The Pioneer Venus Orbiter has been in operation since orbit insertion on December 4, 1978. For the past 11 years, it has been acquiring data in the salient features of the planet, its atmosphere, ionosphere, and interaction with the solar wind. A few of the results of this mission are summarized and their contribution to our general understanding of the planet Venus is discussed. Although Earth and Venus are often called twin planets, they are only superficially similar. Possessing no obvious...
Topics: INDEXES (DOCUMENTATION), LECTURES, NASA PROGRAMS, NEWS, PUBLIC RELATIONS, AEROSPACE TECHNOLOGY...
NASA Technical Documents
by CHEBAN, A. G.; NEGRESKUL, V. V.; OUSH, P. T.; GORCHAK, L. V.; UNGURYANU, G. I.; SMIRNOV, V. G
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MEASURED DARK CURRENT-VOLTAGE CHARACTERISTICS, LIGHT CURRENT-VOLTAGE CHARACTERISTICS UNDER LOAD, AND SPECTRAL RESPONSE CURVES ARE GIVEN FOR PHOTOSENSITIVE ELEMENTS PREPARED BY LIQUID EPITAXIAL GROWTH OF P-TYPE GAAS SUB 1-X P SUB X ON AN N-TYPE GAAS SUBSTRATE. DUE TO THE ABSENCE OF A CONDITIONING SURFACE LAYER, 30% OF THE RADIATION INCIDENT ON THE WORKING SURFACE IS REFLECTED, YIELDING AN EFFICIENCY OF 6 TO 7%. RECOMMENDATIONS ARE GIVEN FOR IMPROVEMENT IN THIS AREA.
Topics: ICE REPORTING, INFRARED IMAGERY, LANDSAT 1, MULTISPECTRAL BAND SCANNERS, CANADA, ICE FORMATION, ICE...
Planetary Science Decadal Survey
by Dr. Martha S. Gilmore, Dr. Lori S. Glaze. Charles L. Baker, and George J. Tahu
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The National Research Council's 2010 Planetary Decadal Survey Inner Planets Panel commissioned the Goddard Space Flight Center's (GSFC) Architecture Design Lab (ADL) to do an enhanced rapid mission architecture study, conducted under NASA Headquarters leadership. The charge was to conceive a Venus mission architecture capable of safe landing in one of the mountainous tessera regions of the planet on a budget comparable to New Frontiers. Using the ADL's five step process (see Appendix), the...
Topics: Venus, Venus Intrepid Tessera Lander, VITaL, NASA, Mission, Concept Study, Decadal
NASA Technical Documents
by Walter, Neil A.; Scialdone, John J
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Outgassing data, derived from tests at 398 K (125 C) for 24 hours in a vacuum as per ASTM E 595-84, have been compiled for numerous materials for spacecraft use. The data presented are the total mass loss (TML) and the collected volatile condensable materials (CVCM). The various materials are compiled by likely usage and alphabetically.
Topics: AMINO ACIDS, VEGETATION GROWTH, POTATOES, SUBSTITUTES, PROTEINS, CALMODULIN
Planetary Science Decadal Survey
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The Mars Sample Return (MSR) concept is a campaign of three missions: a sample acquisition/caching rover mission, a lander mission to fetch the cache and deliver it to Mars orbit via a rocket, and an orbiter mission that would capture the orbiting sample (OS) container and deliver it to Earth via an Earth Entry Vehicle (EEV). A fourth component is the Mars Returned Sample Handling (MRSH) element that would include a sample receiving facility (SRF) and a curation facility. These elements are...
Topics: Mars, NASA, Sample Return, Mission Concept Study, Decadal, Lander
Planetary Science Decadal Survey
by Steven A. Hauck, II, Douglas A. Eng and George J. Tahu
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The purpose of this study was to determine the feasibility of a landed mission to Mercury. It was conducted by the JHU/APL Space Department in partnership with Marshall Space Flight Center, Glen Research Center, and Steven Hauck from Case Western Reserve University. This was conducted as a concept maturity level (CML) 3 study focusing on feasibility trades and options for concepts with a goal of determining whether such a mission could be accomplished within a Principal Investigator (PI)-led...
Topics: Mercury, Concept Study, NASA, Lander, Mission, Decadal
NASA Technical Documents
by Wei, F. S.; Weisbrich, A. L
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Rsults provide functional relationship between rotor performance, blade vibratory loads and dual control settings and indicate that multicyclic control produced significant reductions in blade flatwise bending moments and blade root actuator control loads. Higher harmonic terms of servo flap deflection were found to be most pronounced in flatwise bending moment, transmission vertical vibration and pitch link vibratory load equations. The existing test hardware represents a satisfactory...
Topics: AEROSPACE ENGINEERING, SYSTEMS ENGINEERING, MANAGEMENT METHODS, NASA PROGRAMS, RESEARCH AND...
NASA Technical Documents
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No Abstract Available
Topics: APOLLO PROJECT, COMMAND SERVICE MODULES, LUNAR MODULE, MISSION PLANNING, SPACECRAFT DESIGN, SPACE...
NASA Technical Documents
by Harley, K. G.; Odegard, P. A
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Aerodynamic data from static tests of a two-stage advanced technology fan designed to minimize noise are presented. Fan design conditions include delivery of 209.1kg/sec/sq m (42.85 lbm/sec/sq ft) specific corrected flow at an overall pressure ratio of 1.9 and an adiabatic efficiency of 85.3 percent. The 0.836m (2.74ft) diameter first stage rotor has a hub/tip ratio of 0.4 and 365.8m/sec (1200ft/sec) design tip speed. In addition to the moderate tip speed and pressure rise per stage, other...
Topics: INTERPLANETARY SPACE, STATISTICAL ANALYSIS, SHOCK WAVE PROPAGATION, SOLAR WIND, ECLIPTIC, NUMERICAL...
NASA Technical Documents
by HOHMANN, WALTE
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THIS WORK (ORIGINALLY PUBLISHED IN 1925) CONTRIBUTES TO RECOGNITION OF THE FEASIBILITY OF SPACE TRAVEL. TREATED ARE PROBLEMS ASSOCIATED WITH LEAVING THE EARTH, RETURN TO EARTH, FREE-SPACE FLIGHT, CIRCUM-NAVIGATION OF CELESTIAL OBJECTS, AND LANDING ON OTHER CELESTIAL OBJECTS.
Topics: DIFFUSION THEORY, REACTIVITY, DIFFUSION, SIMULATORS, SHIELDING
NASA Technical Documents
by Kazmar, Richard R
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Pratt & Whitney (P&W) is developing the technology for hypersonic components and engines. A supersonic combustion ramjet (scramjet) database was developed during the National Aero Space Plane (NASP) program using hydrogen fueled propulsion systems for space access vehicles and serves as a point of departure for the current emphasis on hydrocarbon scramjets. The Air Force Hypersonic Technology (HyTech) Office has put programs in place to develop the technologies necessary to demonstrate...
Topics: AIRPORTS, AIR TRANSPORTATION, SIMULATION, INFORMATION MANAGEMENT, AIRSPACE, COMPUTATION, COMPUTER...
For abstract, see N75-20149.
Topics: COMPOSITE MATERIALS, DIFFRACTION PATTERNS, DISPLACEMENT MEASUREMENT, HOLOGRAPHY, LASERS, CERAMICS,...
NASA Technical Documents
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This publication contains extended abstracts of papers presented at the Nineteenth International Laser Radar Conference, held at Annapolis, Maryland, July 6-10, 1998; 260 papers were presented in both oral and poster sessions. The topics of the conference sessions were Aerosol Clouds, Multiple Scattering; Tropospheric Profiling; Stratospheric/Mesospheric Profiling; Wind Profiling; New Lidar Technology and Techniques; Lidar Applications, including Altimetry and Marine; Space and Future Lidar;...
Topics: X-15 AIRCRAFT, PILOT TRAINING, AIRSPEED, AERODYNAMIC CHARACTERISTICS, ANGLE OF ATTACK, LIFT DRAG...
NASA Technical Documents
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Fortran computer program to design plug nozzle by using rao maximum thrust theory
Topics: COMPUTER PROGRAMS, OPTIMUM THRUST PROGRAMMING, CONTOURS, EULER-LAGRANGE EQUATION, FORTRAN, PLUG...
Microbiological and cytological data from Vostok type spacecraft
Topics: BACTERIA, CULTURE TECHNIQUES, CYTOLOGY, MICROBIOLOGY, VOSTOK SPACECRAFT, CYTOLOGY, MICROBIOLOGY,...
The Infrared Astronomical Satellite (IRAS) was launched January 26, 1983. During its 300-day mission, IRAS surveyed over 96 pct of the celestial sphere at four infrared wavelengths, centered approximately at 12, 25, 60, and 100 microns. This is Volume 3, The Point Source Catalog Declination Range 30 deg greater than delta greater than 0 deg.
Topics: EQUIPMENT SPECIFICATIONS, NAVIGATION AIDS, PERFORMANCE TESTS, STAR TRACKERS, ELECTRO-OPTICS, LASER...
NASA Technical Documents
by Dill, Robert P.; Brown, N.; Curtis, R. L.; Herrmann, C. R.; Trampus, A
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The results of a reliability prediction study of the propulsion systems for the MSFC Saturn 5 Vehicle are presented. The TEMPO method of combining the failure mode of each component of the subsystems being analyzed was used throughout the study. Since most of the configurations of the subsystems examined are presently in the development phase, this prediction is based upon the current available data and should be considered a preliminary estimate only.
Topics: GAS GIANT PLANETS, LAUNCHING, PIONEER 10 SPACE PROBE, SPACECRAFT DESIGN, SPACECRAFT PERFORMANCE,...
NASA Technical Documents
by Engelbart, D. C.; English, W. K.; Huddart, B
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Human composition and modification of computer driven cathode ray tube display
Topics: CATHODE RAY TUBES, DISPLAY SYSTEM, COMPUTER PROGRAMS, COMPUTER TECHNIQUES, DISPLAY DEVICES, ON-LINE...
Planetary Science Decadal Survey
by Marc Buie, Joe Veverka
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The National Research Council's Planetary Science Decadal Survey: Primitive Bodies Panel has commissioned NASA's Goddard Space Flight Center (GSFC) with a rapid architecture study conducted under NASA Headquarters leadership. The purpose of the study is to determine whether a mission to orbit the Centaur Object Chiron can be achieved within a New Frontiers cost range with a limited supply of Advanced Stirling Radioisotope Generators (ASRGs). Guidelines include a launch between 2015 and 2025, a...
Topics: Chiron, Orbiter, NASA, Mission Concept Study, Decadal
NASA Technical Documents
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A temporal adaptive algorithm for the time-integration of the two-dimensional Euler or Navier-Stokes equations is presented. The flow solver involves an upwind flux-split spatial discretization for the convective terms and central differencing for the shear-stress and heat flux terms on an unstructured mesh of triangles. The temporal adaptive algorithm is a time-accurate integration procedure which allows flows with high spatial and temporal gradients to be computed efficiently by advancing...
Topics: COMPUTATIONAL FLUID DYNAMICS, WIND TUNNEL TESTS, COMPUTATIONAL GRIDS, COMPUTER PROGRAMS, FLOW...
NASA Technical Documents
by Leontev, U. N.; Vlasov, V. Z
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Theory based on Vlasov general variational method to analyze beams and plates on elastic foundations
Topics: ELASTIC PROPERTIES, FOUNDATIONS, PROBLEM SOLVING, VARIATIONAL PRINCIPLES, VLASOV EQUATIONS,...
NASA Technical Documents
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Spaceborne experiments using the space shuttle payload known as the Long Duration Exposure Facility are described. Experiments in the fields of materials, coatings, thermal systems, power and propulsion, electronic, and optics are discussed.
Topics: ABLATION, HYPERGEOMETRIC FUNCTIONS, MONTE CARLO METHOD, RESONANCE, SCATTERING CROSS SECTIONS,...
NASA Technical Documents
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No Abstract Available
Topics: ENGINE TESTS, NONDESTRUCTIVE TESTS, PERFORMANCE, PROPELLANTS, DEGRADATION, MECHANICAL PROPERTIES
Planetary Science Decadal Survey
by J. Hunter Waite
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This study focused on an in-situ examination of a hydrocarbon lake on the Saturnian moon Titan -- a target that presents unique scientific opportunities as well as several unique engineering challenges (e.g., submersion systems and cryogenic sampling) to enable those measurements. Per direction from the National Research Council (NRC) 2012SS Planetary Decadal Survey Satellites Panel, and after an initial trade-space examination, study architectures focused on three possible New Frontiers' class...
Topics: Titan, Lake, Probe, NASA, Mission Concept Study, Decadal
NASA Technical Documents
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Trajectory data for scheduling flights from venus and mars to earth, 1960-2000
Topics: HANDBOOKS, MARS /PLANET/, VENUS, INTERPLANETARY FLIGHT, INTERPLANETARY TRAJECTORIES, MARS (PLANET),...
NASA Technical Documents
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Following the return to earth on December 2, 1988, of Orbiter OV-104, Atlantis, it was observed that there was substantial Thermal Protection System (TPS) tile damage present on the lower right fuselage and wing. Damage sites were more numerous than on previous flights and conversely, there was almost no damage present on Atlantis' left side. A review team investigated the cause beginning with a detailed inspection of the Atlantis TPS damage, and a review of related inspection reports to...
Topics: EARTH RESOURCES, HYDROLOGY, IMAGE PROCESSING, MINERAL EXPLORATION, OCEANOGRAPHY, PHOTOMAPPING,...
A computer code base on an improved vortex filament/vortex core method for predicting aerodynamic characteristics of slender wings with edge vortex separations is developed. The code is applicable to camber wings, straked wings or wings with leading edge vortex flaps at subsonic speeds. The prediction of lifting pressure distribution and the computer time are improved by using a pair of concentrated vortex cores above the wing surface. The main features of this computer program are: (1)...
Topics: FLIGHT SIMULATORS, ROLL, TURNING FLIGHT, VERTICAL ORIENTATION, HORIZON SCANNERS, MOTION PERCEPTION,...
NASA Technical Documents
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Transformation of data into knowledge through conceptual induction has been the focus of our research described in this paper. We have developed a Machine Learning System (MLS) to analyze the rocket engine simulation data. MLS can provide to its users fault analysis, characteristics, and conceptual descriptions of faults, and the relationships of attributes and sensors. All the results are critically important in identifying faults.
Topics: DYNAMIC LOADS, DIMENSIONAL ANALYSIS, FAILURE MODES, LOAD DISTRIBUTION (FORCES), STRAIN...
NASA Technical Documents
by Carroll, Thomas; Mcavoy, William
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This report describes the atmospheric conditions under which ice is formed upon the exposed parts of airplanes in flight. It identifies the formation found under different conditions, and describes some studies of preventative means.
Planetary Science Decadal Survey
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At the request of the Satellites Panel of the Planetary Science Decadal Survey, a Rapid Mission Architecture (RMA) study of possible missions to Saturn's moon Enceladus was conducted at the Jet Propulsion Laboratory (JPL) in January and February of 2010. Fifteen mission architectures were examined that spanned a broad range of potential science return and total estimated mission cost. This report documents the findings of that study.
Topics: Enceladus, NASA, Mission Concept Study, Decadal
NASA Technical Documents
by Bialous, A. J.; Peters, P. H.; Stone, E. E
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Leakage testing handbook giving fundamentals, theory, methods, detector equipment, and test media
Topics: FOAMS, LIQUID COOLING, ROCKET ENGINES, COOLING SYSTEMS, PERFORMANCE TESTS, SURFACE LAYERS
NASA Technical Documents
by Savin, G. N
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Stress concentration around holes and fissures including stress-strain diagrams - bibliography
Topics: DEFORMATION, METEORITES, QUARTZ, X RAY DIFFRACTION, IMPACT DAMAGE, ROCKS, SHOCK WAVES
NASA Technical Documents
by Holmes, R. F.; Keller, E. E.; King, C. D
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Catalytic carbon dioxide reduction cartridge for oxygen recovery in life support systems of long term manned space flights
Topics: ISOTOPE SEPARATION, SPACE COMMERCIALIZATION, URANIUM ISOTOPES, ORBITAL WORKSHOPS, PRODUCTION...
NASA Technical Documents
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Information is presented on the most important features of atmospheric radiation such as the quantitative characteristics of molecular absorption and scattering, spectral and angular distributions, and the three-dimensional structure of shortwave and longwave radiation fields. The model of the structure and composition of the atmosphere is described, and the fundamental optical characteristics of absorption and scattering of radiation by the atmosphere are examined. The principles are studied...
Topics: CHEMICAL ENGINEERING, GELS, INORGANIC COMPOUNDS, COST ANALYSIS, PATENT POLICY, SILICON DIOXIDE
The AIAA/NASA Conference on Intelligent Robotics in Field, Factory, Service, and Space (CIRFFSS '94) was originally proposed because of the strong belief that America's problems of global economic competitiveness and job creation and preservations can partly be solved by the use of intelligent robotics, which are also required for human space exploration missions. Individual sessions addressed the following topics: (1) vision systems integration and architecture; (2) selective perception and...
Topics: COMPUTER NETWORKS, CENTRAL PROCESSING UNITS, RESEARCH AND DEVELOPMENT, COMPUTER SYSTEMS DESIGN,...
Planetary Science Decadal Survey
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This paper addresses the exploration of the martian atmosphere and focuses on broad atmospheric science goals that can be obtained from orbit. It presents the key questions in atmospheric science that remain unanswered and what progress can be made towards answering them in the coming decade.
NASA Technical Documents
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The mandated elimination of CFC'S, Halons, TCA, and other ozone depleting chemicals and specific hazardous materials has required changes and new developments in aerospace materials and processes. The aerospace industry has been involved for several years in providing product substitutions, redesigning entire production processes, and developing new materials that minimize or eliminate damage to the environment. These activities emphasize replacement cleaning solvents and their application,...
Topics: AMINO ACIDS, RADIOACTIVITY, CARBON 14, ETHYL COMPOUNDS, NUCLEOTIDES, ENZYME ACTIVITY, THIOLS,...
Thermodynamic properties of tungsten, molybdenum, titanium, zirconium, niobium, and tantalum metal and compounds
Topics: MOLYBDENUM, ZIRCONIUM, MOLYBDENUM, NIOBIUM, TANTALUM, THERMODYNAMIC PROPERTY, TITANIUM, TUNGSTEN,...
NASA Technical Documents
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SCT-1 and SCT-2 liquid propellant rocket engine construction and launch, using ethyl alcohol and liquid oxygen
Topics: CONSTRUCTION, SCT-1 ROCKET, SCT-2 ROCKET, ETHYL ALCOHOL, LAUNCHING, LIQUID OXYGEN, LIQUID...
Experimental performance of hydrogen-fluorine rocket engine at several chamber pressures and exhaust-nozzle expansion area ratios
Topics: EXHAUST NOZZLES, HYDROGEN FUEL, LIQUID PROPELLANT ROCKET ENGINE, NOZZLE EXPANSION, FLUORINE,...
NASA Technical Documents
by Hargrove, W. J
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The ALDCS development and design tasks, ALDCS functional configuration, and resulting challenges encountered while accomplishing the first phase of the program are described. These tasks are establishing system requirements and criteria and synthesizing a system mechanization to meet the desired load alleviation, stability margins, flight safety, and flying qualities performance. Results of the ALDCS development and prototype system flight simulation programs, and control law optimization...
Topics: COMMERCIAL AIRCRAFT, KEYING, PILOTS (PERSONNEL), FLYING PERSONNEL, PILOT TRAINING, TELEPRINTERS
No Abstract Available
Planetary Science Decadal Survey
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The purpose of this study was to determine the feasibility of a Lunar Geophysical Network (LGN) mission to the Moon. It was conducted by Marshall Space Flight Center's, Robotic Lunar Lander Development Project team in partnership with the Johns Hopkins University/Applied Physics Laboratory (JHU/APL). This study was documented based on previous trades, analysis and options for concepts developed by the team over the last 18 months, with a goal of determining whether such a mission could be...
Topics: Lunar Geophysical Network, (LGN), NASA, Mission Concept Study, Decadal, Lunar, Moon
NASA Technical Documents
by Wilden, K. S.; Harris, C. G.; Flynn, B. W.; Gessel, M. G.; Scholz, D. B.; Stawski, S.; Winston, V
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The goal of Boeing's Advanced Technology Composite Aircraft Structures (ATCAS) program is to develop the technology required for cost-and weight-efficient use of composite materials in transport fuselage structure. Carbon fiber reinforced epoxy was chosen for fuselage skins and stiffening elements, and for passenger and cargo floor structures. The automated fiber placement (AFP) process was selected for fabrication of stringer-stiffened and sandwich skin panels. Circumferential and window...
Topics: PROPULSION, LIFT DRAG RATIO, LIQUID OXYGEN, LIQUID HYDROGEN, LOW EARTH ORBITS, LOW THRUST, REUSABLE...
NASA Technical Documents
by Garza, Frederico R.; Morelli, Eugene A
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Nonlinear six degree-of-freedom simulations for a variety of aircraft were created using MATLAB. Data for aircraft geometry, aerodynamic characteristics, mass / inertia properties, and engine characteristics were obtained from open literature publications documenting wind tunnel experiments and flight tests. Each nonlinear simulation was implemented within a common framework in MATLAB, and includes an interface with another commercially-available program to read pilot inputs and produce a...
Topics: CLOSED ECOLOGICAL SYSTEMS, AEROSPACE MEDICINE, AEROSPACE ENVIRONMENTS, MICROGRAVITY, SPACE...
NASA Technical Documents
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Tabulated values of longwave and shortwave radiation fluxes and also cooling and heating rates in the atmosphere for standard atmospheric profiles are presented. The radiation codes used in the Goddard general circulation model were employed for the computations. These results were obtained for an international intercomparison projected called Intercomparison of Radiation Codes in Climate Models (ICRCCM).
Topics: ELECTRON IRRADIATION, POLYMERIC FILMS, RADIATION DOSAGE, SUBSTRATES, THIN PLATES, ELECTRON...
Guidance and control, engineering development, environmental simulation, jet propulsion, space science, and telecommunications
Topics: AEROSPACE SCIENCES, GUIDANCE AND CONTROL, JET PROPULSION, SPACE SCIENCE, TELECOMMUNICATION, CONTROL...
NASA Technical Documents
by Braverman, A. S.; Grodko, L. N.; Leykand, M. A.; Mil, M. L.; Nekrasov, A. V
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Rotor aerodynamics in relation to historical and ideal development of helicopters
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Topics: AERODYNAMICS, HELICOPTER DESIGN, HELICOPTERS, HISTORIES, ROTOR AERODYNAMICS, HELICOPTER DESIGN,...
NASA Technical Documents
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A conceptual design of a free piston solar Stirling engine-linear alternator which can be designed and developed to meet the requirements of a near-term solar test bed engine with minimum risks was developed. The conceptual design was calculated to have an overall system efficiency of 38% and provide 15kW electric output. The free piston engine design incorporates features such as gas bearings, close clearance seals, and gas springs. This design is hermetically sealed to provide long life,...
Topics: ANALOG TO DIGITAL CONVERTERS, DATA TRANSMISSION, MODEMS, SIGNAL PROCESSING, TELEMETRY,...
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Topics: AERONAUTICAL ENGINEERING, METEOROLOGY, RESEARCH AND DEVELOPMENT, DOCUMENTS, INDEXES...
NASA Technical Documents
by Brennan, P. J.; Kroliczek, E. J
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No Abstract Available
Topics: HYDROGEN OXYGEN ENGINES, TURBOROCKET ENGINES, ORBIT TRANSFER VEHICLES, ROCKET ENGINE DESIGN,...